score = float( input('请输入成绩（0-100）：') )
s = input("是文科还是理科:")
t = input("是否体育生:")
if s == "文":
    score=score*1.1
if t == "是":
    score=score*1.1
if score >= 90:
    print('A')
elif score >= 80:
    print('B')
elif score >= 70:
    print('C')
elif score >= 60:
    print('D')
else:
    print('E')
